An eerie, existential museum dedicated to the author of "The Metamorphosis."

This no man's land slicing through the island is strewn with abandoned relics of another time.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.

Colorful concentric circles honor a small Croatian town's supposed spot at the nucleus of it all.

An ancient knight and a symbol of the city's freedom.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

Longest fortress system anywhere in Europe.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

This huge metal monument is slowly being stripped to its concrete skeleton.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Gargoyle head that brings good luck.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

"Holy Wisdom" overlooks the city that became its namesake.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.